Flexural Behavior of Post-Tensioned Normal and High Strength Concrete-Filled Fiber-Reinforced Polymer Tubes

2021 ◽  
Vol 118 (2) ◽  
Author(s):  
Asmaa Abdeldaim Ahmed ◽  
Mohamed Hassan ◽  
Radhouane Masmoudi
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Fiber Reinforced Polymer ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Strength Concrete ◽  
Reinforced Polymer ◽  
Polymer Tubes ◽  
Post Tensioned

Mechanical performance of glass fiber–reinforced polymer tubes filled with steel-reinforced high-strength concrete subjected to eccentric compression

2016 ◽  
Vol 20 (3) ◽  
pp. 374-393 ◽  
Author(s):  
Le Zhou ◽  
Lianguang Wang ◽  
Liang Zong ◽  
Gang Shi ◽  
Yunhao Bai ◽  
...  
Keyword(s):  
Glass Fiber ◽  
High Strength Concrete ◽  
High Strength ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Strength Concrete ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Polymer Tubes

Glass fiber–reinforced polymer tubes filled with steel-reinforced high-strength concrete are proposed as glass fiber–reinforced polymer–steel-reinforced high-strength concrete composite members. Eccentric compression is a typical loading scenario for such column members in practice. Experimental investigation on eight glass fiber–reinforced polymer tubes filled with steel–reinforced high-strength concrete columns subjected to eccentric compression was conducted. The effects of fiber orientation, thickness of glass fiber–reinforced polymer tube, slenderness ratio of columns, and loading eccentricity were investigated. It was found that the compression bearing capacity of glass fiber–reinforced polymer–steel-reinforced high-strength concrete columns increased with the decrease in the fiber tangle angle and the increase in the thickness of the glass fiber–reinforced polymer tube but reduced with the increase in the eccentricity and the slenderness ratio. Corresponding formulas were developed based on the nonlinear full-process analysis theory to describe the compression behavior of glass fiber–reinforced polymer–steel-reinforced high-strength concrete under eccentric loading. Good agreement was found through the comparison between the theoretical and the experimental results. The validated modeling approach was, therefore, employed to develop a parametric analysis that can be used to provide valuable guidance for practical application and further research on such structural members.

Seismic performance of high-strength concrete square columns confined with carbon fiber reinforced polymers (CFRPs)

2005 ◽  
Vol 32 (3) ◽  
pp. 569-578 ◽  
Author(s):  
A Hosseini ◽  
Ali R Khaloo ◽  
S Fadaee
Keyword(s):  
Carbon Fiber ◽  
High Strength Concrete ◽  
High Strength ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Moment Frames ◽  
Strength Concrete ◽  
Reinforced Polymer ◽  
Group I ◽  
Carbon Fiber Reinforced

This paper presents the results of an experimental and analytical study on high-strength, reinforced-concrete (RC) columns with different levels of initial ductility enhanced with carbon fiber reinforced polymer (CFRP) wraps. Six square columns 260 mm wide and 1650 mm long were tested under constant axial load and reversed cyclic lateral load. The test specimens were divided into three groups. Groups I and II were designed and detailed according to the requirements of American Concrete Institute ACI318-02 for intermediate-moment frames. Group I was wrapped with CFRP, group II was control specimens, and group III was designed and detailed according to the requirements of ACI318-02 for special-moment frames. Each group consisted of two columns with ρsl = 1.5% and 3.0% longitudinal steel rebars, where ρsl is the ratio of area of longitudinal reinforcement to gross area of concrete. The moment–curvature is numerically calculated for sections with fiber reinforced polymer (FRP) confinement. The theoretical prediction provides conservative results compared with the test data. Based on the test results, CFRP enhanced ultimate displacement and curvature ductility by 53% and 79%, respectively, in column WI4 with four longitudinal bars and 27% and 28%, respectively, in column WI8 with eight longitudinal bars. Moreover, the performance of wrapped columns was enhanced to a level higher than that of unwrapped columns designed according to special-moment frames.Key words: strengthening, ductility, FRP wrap, moment–curvature, high-strength concrete.

Sign in / Sign up

Export Citation Format

Share Document